Worried about thermal performance

[andropof]

Hi there!
this year i'll start going to university so i need a laptop for mobility, my biggest passion (and job) is 3D computer graphics, simulations and rendering, but i'll use programs such as illustrator e photoshop too, often i render for at least 1/2 hours and that's why i'm very worried.

My budget allows me to get a i7 9750h and rtx 2060, but i need some advice abous chassis, here's the models i can affort:
-OPTIMUS X
-RECOIL III RTX
-VORTEX IX

I need a computer that allows me to run a the hightest clock speed possible (not below 3,6/3.6 ghz on all cores) for about 1/2 hours without exceeding 90 degrees: please be very honest, do you think i'll be able to do that with those chassis? I'll do whatewer is possible, including using great thermal paste, thermal pads and undervolting, the laptop will remain always raised too.
I've seen many people complaining about thermal performance and i'm very worried, 1400 euros are a lot of money, i don't care about size, weight or battery

So, does anybody know on which model temperatures are better, and do you have any pictures that shows the heat pipes of those chassis (i've managed to find only of VORTEX IX)? Do you have any idea about the power limits in TDP? Please tell me your experiences if you can! I'm interested in OPTIMUS X in particular, can someone send it's interiors?

Thank you all, and sorry for my bad english

 

[Oussebon]

not below 3,6/3.6 ghz on all cores

Why so specific? 3550MHz is just too slow?

Also the thing with 8th and 9th Gen Intel mobile CPUs is that they do throttle down due to power / thermal limits. That's what happens when Intel try to stuff 6 cores into the same sort of CPU that a gen before had 4...

Note this review of a Recoil II with an 8750H:

Starting with the CPU, a peak of just 81C is a top result, and that is only furthered by the fact that this temperature came with the CPU clock speed holding at 3.1GHz across all cores. The GS65, for instance, could only push all 6 cores to 2.8GHz, and even then the CPU still peaked at 85C.

PC Specialist Recoil II (i7-8750H & GTX 1060) Laptop Review - KitGuru

The PC Specialist Recoil II is the latest laptop to come through our labs sporting an Intel 8th Gen

www.kitguru.net

i.e. it hit 3.1GHz on AIDA64 load, and that was still better than the competition......

So be sure your expectations are realistic.

The Recoil, as above, used to be one of the better options for thermal performance. However, a few users of late have posted concerns about their recent purchases. These could be one-offs, or something with the current range is perhaps not always perfect. Do not that this is like ~3 people posting about Recoil temps... and PCS will sell hundreds or thousands of them...

The Vortex has had positive reviews and seems to perform decently for thermals.

I'm not sure anyone, anywhere, or any store can guarantee what you're looking for though. i.e. a 9750H + RTX 2060 laptop, with really high boost clocks, that will never exceed 90 degrees ever under rendering load, for 1400€. I'm not sure if anyone can guarantee you that with a lot more € either...

I think what you're looking for is called a desktop

Would a desktop be viable? With a small, cheap laptop for portable work. It's not like you'll be rendering in the lecture theatre.

 

[phitol]

Even in performance mode on my 9750h defiance V, the long term TDP is 50W, under stress testing with Aida 64 that is 3.1ghz sustained with 125mv undervolt. In CB R15, that’s around 3.5to 3.7ghz as it’s not as demanding and sustained temps are mid 70s.
To get AiDA64 stress testing to 3,6ghz sustained, you’d have to run very high TDPs which I would not recommend and then if the app also uses the GPUs that will drag the CPU down.

Ultimately , as mentioned, if you are serious about your work, just get a desktop, my water cooled R2700x is silent and will sit all day at 4.3ghz on all cores, a 3900x would absolutely destroy any laptop and a cheap CLC water cooler wouldn’t break the bank.

 

[andropof]

I see what you mean, it would be ideal. But i'll have to live several mounth abroad so probably i will not be able to carry my desktop with me unfortunately. I mean...i'll do my best to live 3 years with those compromises, considering i have a i5-3470 + 960 (desktop) right now it will be a pretty decent upgrade anyway: vray and cycles use cpu+gpu at the same time so it will be very fast anyway.

I'm sorry if i've sounded foolish believing it could reach those clock speeds, but I have read about people that managed to get 3.5 and 3.9 ghz on those chassis:
-https://www.youtube.com/watch?v=UM9Rd8YdcDA&list=LLD8eooYAQyOf_YzUo5XL9Ag&index=5&t=635s
-https://www.pcspecialist.co.uk/forums/threads/vortex-ix-first-look.62977/

So you think Recoil III is the better option of the 3? Maybe i can build a small format desktop that i can still bring with me during my travels...such a difficult choice

 

[phitol]

I see where your expectations come, although they don't provide enough evidence to suggest (IMO) that a sustained stress test would yield all core 3.6Ghz levels of performance in all situations.

As an example, note this review of what I think is the 17" version of the Vortex IX (https://www.notebookcheck.net/Eurocom-Nightsky-RX17-Clevo-PB71RF-Laptop-Review.426428.0.html)
In the performance section, they do back to back runs of Cinebench R15, and note that first run gets a nice score, all subsequent runs are around the 1100 mark, which aligns with the 'first look' review you posted above where the author noted the drop to 3.3-3.5GHz at the end of some runs (although this is not a bug, this was as he postulated, the turbo duration is just a few tens of seconds, not quite enough for a complete test run).

But, saying all that, if your 3.6Ghz requirement just meant, "similar performance" to the reviews, then I'd say your expectations are OK as it's quite easy to expect 3.0 - 3.3Ghz from all laptops mentioned even under severe stress levels (with undervolt in place)

In terms of which laptop, I can't say with certainty, I think most issues (build anomalies aside) stem from poor CPU/GPU TDP profiles that don't work in harmony with the cooling solution.
On that basis, I'd probably lean towards the Vortex IX as it's Clevo based and I've not had many bad experiences with Clevo, the TongFang chassis seems anecdotally to gather more discussion, although largely from the only instances I've seen there does seem to be some odd TDP choices considering it's cooling solution is nothing out of the ordinary. Of course, tweaking and managing performance profiles yourself would probably alleviate any issues on any laptop.